(2)It adopts advanced elastic auger coating conveying device and is more suitable for coating of breakable seed, easy for cleaning without broken seed.The machine uses all-enclosed structure to avoid the medicine smell which is harmful to the operator.

1. Working Principle: Seeds and other impurities are separated by their different physical and mechanical properties. It mainly employs characteristics following to work (1) Winnowing part, depending on weight and aerodynamic characteristics, can get different air velocities by changing sectional area of inlet duct and then realize cleaning. (2) Screening is based on size differences of seeds and impurities, and is realized by given mesh holes. There are round hole and slotted hole screens for the machine.